Dear all,
According the USRP v4 description:
http://www.ettus.com/downloads/usrp_v4.pdf
http://www.ettus.com/downloads/usrp_v4.pdf
the usrp is able to process signals up to 16MHz.
As the USB port is limited to 60MB/s, and if the samples are coded on 32
bits (16 for Q and 16 for I), the maximal bandwidth equals 15MHz.
Which version is correct?
Furthermore, considering that the first ADC works at 64Ms/s, the
available rate for the USB equals:
32/2 (is it available ?)
32/3
32/4
32/5
…
32/256
Am I right ?
Thank you for your answers,
Pierre Jallon
JALLON Pierre 201932 wrote:
As the USB port is limited to 60MB/s, and if the samples are coded on 32
bits (16 for Q and 16 for I), the maximal bandwidth equals 15MHz.
The USRP can code signals as 32 bits (16 for Q and 16 for I)
In this case the usrp is able to process signals up to 8 MHz.
The USRP can also code signals as 16 bits (8 for Q and 8 for I)
In that case the usrp is able to process signals up to 16 MHz.
32/2 (is it available ?)
Am I right ?
the first ADC works at 64Ms/s, the
available rate for the USB equals:
64/4 (64/4 is only available with halfband filter disabled)
64/8
64/12
64/16
64/20
…
64/256
The halfband filter in the usrp firmware has a minimal decimation rate
of 8. That is why 64/4 is only available with halfband disabled.
Martin
JALLON Pierre 201932 schrieb:
As the USB port is limited to 60MB/s
That is net bandwith. You have to subtract the overhead. Moreover you
have to find chipsets that really support this rate.
Currently 32MB/s is a achievable value for the USRP.
Patrick
Engineers motto: cheap, good, fast: choose any two
Patrick S.
Student of Telematik, Techn. University Graz, Austria
Hi,
USRP can transfer data at maximum of 32MB/s using its USB2. When the
data
are 16 bit wide (16bit I and 16 bit Q) then maximum complex transfered
data
will be 8 Msps which gives idealy maximum 8 MHz bandwidth. However, if
we
use 8 bit data wide ( 8bit I, and 8bit Q), then maximum transfer will be
16
Msps complex data. This means, the USRP can process signals up to 16
MHz.
Firas
JALLON Pierre 201932 wrote:
the usrp is able to process signals up to 16MHz.
32/5
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